Hi Radim, thanks for reaching out. I was able to find an old registration for that device, which would explain the error message you're seeing. I will have to get permission from the previous owner to remove the current registration, but once we have that I can free up this device so you can add it to your own inventory. I will let you know as soon as I hear back from the original owner, please let me know if you have any questions in the mean time.
